Evidence map›Paper›PMID 33499330›Full record

ArticleBrain sciences2021

Transcranial Evoked Potentials Can Be Reliably Recorded with Active Electrodes.

Marco Mancuso, Valerio Sveva, Alessandro Cruciani, Katlyn Brown, Jaime Ibáñez, Vishal Rawji, Elias Casula, Isabella Premoli, Sasha D'Ambrosio, John Rothwell and 1 more

Abstract read
In one paragraph

Article in Brain sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Clinical utility and prospective of TMS-EEG: Updated review from an international expert group.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2026
    Review
  5. Article
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  7. Article
  8. Review
  9. Article
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  11. Article
  12. Article
  13. Reliability and Validity of Transcranial Magnetic Stimulation-Electroencephalography Biomarkers.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2023
    Review
  14. Review
  15. Article
  16. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Marco MancusoDepartment of Human Neurosciences, University of Rome "Sapienza", 00185 Rome, Italy.ORCID 0000-0002-4485-2200
Valerio SvevaDepartment of Human Neurosciences, University of Rome "Sapienza", 00185 Rome, Italy.
Alessandro CrucianiNeurology, Neurophysiology and Neurobiology Unit, Department of Medicine, Università Campus Bio-Medico di Roma, 00128 Rome, Italy.
Katlyn BrownDepartment of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK.
Jaime IbáñezDepartment of Bioengineering, Faculty of Engineering, Imperial College London, London SW7 2AZ, UK.ORCID 0000-0001-8439-151X
Vishal RawjiDepartment of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK.
Elias CasulaNon-Invasive Brain Stimulation Unit, IRCCS Santa Lucia Foundation, 00142 Rome, Italy.
Isabella PremoliInstitute of Psychiatry, Psychology, and Neuroscience, King's College London, London SE5 8AF, UK.ORCID 0000-0002-2508-6440
Sasha D'AmbrosioChalfont Centre for Epilepsy, Chalfont St. Peter SL9 0RJ, UK.
John RothwellDepartment of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK.
Lorenzo RocchiDepartment of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK.ORCID 0000-0003-3979-156X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Electroencephalographic (EEG) signals evoked by transcranial magnetic stimulation (TMS) are usually recorded with passive electrodes (PE). Active electrode (AE) systems have recently become widely available; compared to PE, they allow for easier electrode preparation and a higher-quality signal, due to the preamplification at the electrode stage, which reduces electrical line noise. The performance between the AE and PE can differ, especially with fast EEG voltage changes, which can easily occur with TMS-EEG; however, a systematic comparison in the TMS-EEG setting has not been made. Therefore, we recorded TMS-evoked EEG potentials (TEPs) in a group of healthy subjects in two sessions, one using PE and the other using AE. We stimulated the left primary motor cortex and right medial prefrontal cortex and used two different approaches to remove early TMS artefacts, Independent Component Analysis and Signal Space Projection-Source Informed Recovery. We assessed statistical differences in amplitude and topography of TEPs, and their similarity, by means of the concordance correlation coefficient (CCC). We also tested the capability of each system to approximate the final TEP waveform with a reduced number of trials. The results showed that TEPs recorded with AE and PE do not differ in amplitude and topography, and only few electrodes showed a lower-than-expected CCC between the two methods of amplification. We conclude that AE are a viable solution for TMS-EEG recording.

Indexed as

active electrodesEEG artefactselectroencephalographyindependent component analysismotor evoked potentialsneurophysiologyTMS-EEGtranscranial evoked potentialstranscranial magnetic stimulation

Identifiers

PMID33499330
PMCPMC7912161

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.